Monitoring Nitrogen Leaf Resorption Kinetics by Near‐Infrared Spectroscopy during Grain Filling in Durum Wheat in Different Nitrogen Availability Conditions

• DOI: 10.2135/cropsci2013.02.0099
• Publication Date: 2013-12-13T20:20:10Z
• Authors: Ingrid Vilmus; Martin Ecarnot; Nicolas Verzelen; Pierre Roumet
• Keywords: [SDV.SA]Life Sciences [q-bio]/Agricultural sciences; 2. Zero hunger; 0301 basic medicine; protéine végétale; 03 medical and health sciences; 669; Triticum spp; [SDV.IDA]Life Sciences [q-bio]/Food engineering; [SDV.BV]Life Sciences [q-bio]/Vegetal Biology; [SDV.AEN]Life Sciences [q-bio]/Food and Nutrition; [SDV.BDD]Life Sciences [q-bio]/Development Biology

ABSTRACT In wheat ( Triticum spp.), the N content of leaves during grain filling period (GFP) plays a key role in maintaining photosynthetic activity and determining amount available for protein (GPC). We documented flag leaf resorption durum turgidum L.) plants under nonlimiting level 2010 two different levels fertilization 2011. During GFP, we monitored changes by nondestructive method based on near‐infrared spectroscopy. The datasets were modeled each plant; parameters extracted analyzed to determine which source variation (genotype and/or availability) predominated. Different genotypic profiles highlighted opposing Ixos versus Primadur when comparing availability, with being most affected low preanthesis. High postanthesis availability delayed beginning (t0) there was strong negative correlation between t0 duration. Delayed associated better yield components. A high proportion per spike GPC explained multiple linear regressions combining width dynamic availability. may result from initiation filling, potentially increasing if or occurring early.